#include <bits/stdc++.h>
using std::cin;
using std::cout;

typedef long long ll;
typedef std::vector <int> vector;

int n;
int ans[20054];
bool ok[20054];
vector g[1005];

void work() {
    int i, l, t, p; bool u;
    cin >> n;
    for (i = 1; i <= n; ++i)
        for (ok[i] = false, cin >> l; l; --l)
            cin >> t >> p,
            g[(t - 1) * 10 + p].emplace_back(i);
    ok[1] = true;
    for (t = 1; t <= 1000; ++t) {
        u = false;
        for (int x : g[t]) u = u || ok[x];
        for (int x : g[t]) ok[x] = u;
        g[t].clear();
    }
    for (p = 0, i = 1; i <= n; ++i) if (ok[i]) ans[p++] = i;
    for (i = 0; i < p; ++i) cout << ans[i] << (i == p - 1 ? '\n' : ' ');
    if (!p) cout.put(10);
}

int main() {
    int T;
    std::ios::sync_with_stdio(false), cin.tie(NULL);
    for (cin >> T; T; --T) work();
    return 0;
}